Resin composition suitable for the production of films



Patented Nov. 15, 1932 PATENT OFFICE HENRY a. GARDNER, or wasnme'ron,msr'nro'r or COLUMBIA nnsm comrosrrron SUITABLE roa rrm rnonuc'rron 01'ms R0 Drawing.

This invention relates to resinous compositions adapted to be combinedwith other materials, such as drying oils and thinners, to givefilm-forming compositions. The resinous compositions of my inventon areformed by incorporating, advantageously by heating or fusion,chlorinated diphenyl into known resins, both natural and artificial,such as rosin, glycerin ester resin, glycerin ghthalate resin, cumaronresin and the like.

y the expression chlorinated diphenyl I refer to a resinous body, whichmay ran e from a hard, solid mass to a soft, sticky, a hesive mass,which resinous body is produced by reacting diphenyl with chlorine, thelatter in an amount snfiicient to produce a chlorine-containing complex'containin a relatively large amount of chlorine. The

p poduct is described in the literature (Annalen der Chemie, vol. 189,pages 138 and 145,

and vol. 207, pages 339 and 342). Illustrative of such resinous bodiesis the commercial product comprising diphenyl chlorinated to about 60%(i. e., containing 60% of chlorine). Since the percentage content ofchlorine for a given product approximates the degree of se aration ofthe product with chlorine, the said products are referred to either bytheir chlorine percentage content or. percentage of separation withchlorine. The invention is illustrated by the following examples.

Example 1.-Glycerin phthalate, a product described by Watson Smith in1901 in the Journal of the Society of Chemical Industry, is prepared,for instance, by heating 100 parts by weight of phthaliq anhydrid with32 parts b weight of glycerin to a temperature not higher than 190 C.To'the resulting fluid mass there-is added with stirring parts by weightof chlorinated diphenyl which has been chlorinated to the extent of to60 percent of saturation. The product is a light colored resinouscomposition.

Example 2-100 parts by weight of, rosin;

are heated with 12 parts by weight of glycerin at a tem rature of about2 0 C. until the acid num er of the product is about 20. 25 parts byweight of chlorinated diphenyl are added to the resulting glycerin-esterresin and incorporated by stirring.

Application flied February 12, 1930. Serial No. 427,951.

' Example 3.-100 parts by weight of cumaron resin is melted and into itis stirred 2 5. parts by Weight of chlorinated diphenyl.

Example 4-7 5 parts by wei ht of a synthetic resin such as toluene sulonamid con-- densed with formaldehyde are heated with 25 parts by weightof chlorinated diphenyl and 25 parts by weight of the glycerin ester ofrosin. The resulting resinous composition is soluble in lacquer solventsand is compatible with nitrocellulose and other cellulose ester andether-Solutions.

Rosinand other natural resins and various synthetic resins may betreated with chlorinated diphenyl in a similar manner.

The resin compositions prepared as described may be employed in theproduction of film-formin compositions, bein particularly suitable ortheproduction 0 oil varnish. For example,"-'100 parts by weight of theresin composition produced 'in accordance with Example 1 areboiledwith200 parts of .tung oil until a homogeneous mixture is formedwhich is suitably-thinned with turpentine and appliedas a'varnish. Theresins" may be combined with any of the so-called varnish oils, such astung oil, linseed oil, etc., and thinned like known oil varnishcompositions with turpentine, mineral spirits and the like and driersmay be added. The resulting .80

compositions dry with great rapidity to tough, light colored films orcoatings. Ap-

parently the chlorinated diphenyl compo;

nent or perhaps'some'reaction product thereof in the composition has theproperty of causing the oil varnish films to set orharden with greatspeed.

Another remarkable property of the filmforming compositions madefromthejresin compositions of my invention is that succes sive coatingsmay be applied at short intervals, say 30 minutes, to build up a heavycoat ing whlch may then be baked and the resulting coatin is capable ofserving as the'base for other lm-forming compositions such asnitrocellulose lacquer.

Within the scope of my invention, as above described, the chlorinateddiphenyl and resin may be combined in difi-erent ways and invariousproportions and the chlorinated diphenyl may be chlorinated to a greateror less extent than that indicated and other materials such as pigmentsmay be added to or incor orated into the resin compositions.

I c aim:

1. A coating resin composition consisting essentially of a resinousmaterial of 'the group consistlng of rosin, glycerin ester resin,cumaron resin, and glycerln ester and aldehyde condensates, chlorinateddiphenyl, and a drying oil.

2. A resin composition compatible with nitrocellulose solutionscomprising toluene sulfonamid-formaldehyde resin, chlorinated diphenyland glycerin ester rosin.

3. coating composition comprising a mixture of chlorinated diphenyl anda resinous material of the group conslsting of rosin, glycerin esterresin, cumaron resin, and glycerin ester and aldehyde condensates.

4. A coatin composition comprising a mixture of ch orinated diphenyl, adrying oil, and a resinous material of the group consisting of rosin,lycerin ester resin, cumaron resin, and gy cerin ester and aldehydecondensates.

In testimony whereof, I afiix my signature.

HENRY A. GARDNER.

composition comprising a.

